package org.example.lys.utils;


import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;


/**
 * @author ; lidongdong
 * @Description
 * @Date 2019-09-23
 */
public class EasyPoiUtils {

    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) throws Exception {
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);

    }

    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) throws Exception {
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
    }

    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response, HttpServletRequest request) throws Exception {
        defaultExport(list, pojoClass, fileName, response, request, new ExportParams(title, sheetName));
    }

    public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws Exception {
        defaultExport(list, fileName, response);
    }

    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws Exception {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        if (workbook != null) {
            ;
        }
        downLoadExcel(fileName, response, workbook);
    }

    private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, HttpServletRequest request, ExportParams exportParams) throws Exception {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        if (workbook != null) {
            ;
        }
        downLoadExcel(fileName, response, request, workbook);
    }

    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws Exception {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition",
                    "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (IOException e) {
            throw new Exception(e.getMessage());
        }
    }

    private static void downLoadExcel(String fileName, HttpServletResponse response, HttpServletRequest request, Workbook workbook) throws Exception {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            String header = request.getHeader("user-agent");
            if (StringUtils.isNotBlank(header)) {
                if (header.toUpperCase().contains("FIREFOX") || header.toUpperCase().contains("SAFARI")) {
                    //兼容火狐浏览器
                    response.setHeader("Content-Disposition",
                            "attachment;filename=" + new String(fileName.getBytes("utf-8"), "ISO-8859-1"));
                }
            } else {
                //其他浏览器谷歌等
                response.setHeader("Content-Disposition",
                        "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            }

            workbook.write(response.getOutputStream());
        } catch (IOException e) {
            throw new Exception(e.getMessage());
        }
    }

    private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws Exception {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        if (workbook != null) {
            ;
        }
        downLoadExcel(fileName, response, workbook);
    }

    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws Exception {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new Exception("模板不能为空");
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception(e.getMessage());
        }
        return list;
    }


    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass) throws Exception {
        if (file == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new Exception("excel文件不能为空");
        } catch (Exception e) {
            throw new Exception(e.getMessage());
        }
        return list;
    }

    public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) throws Exception {
        if (file == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(0);
        params.setHeadRows(1);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new Exception("excel文件不能为空");
        } catch (Exception e) {
            throw new Exception(e.getMessage());
        }
        return list;
    }

    /**
     * 加的一个模板的导出
     *
     * @param list
     * @param fileName
     * @param response
     * @throws Exception
     */
    public static void defaultExportTemp(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws Exception {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        if (workbook != null) {
            ;
        }
        downLoadExcel(fileName, response, workbook);
    }

    public static Workbook createWorkbook(List<?> list, String title, boolean isCreateHeader, String sheetName, Class<?> pojoClass) {
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        return ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
    }
}
